<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    * {
      margin: 0px;
      padding: 0px;
    }

    tr th {
      text-align: left;
      background-color: blue;
      color: azure;
    }

    tr td,
    th {
      border-bottom: 1px solid #ccd5ff;
    }

    .even {
      background-color: #ccd5ff;
    }
  </style>
</head>

<body>
  <table width="350"  cellpadding="0" cellspacing="0"> 
    <tr>
      <th>标题一</th>
      <th>标题二</th>
      <th>标题三</th>
    </tr>
    <tr>
      <td>数据一</td>
      <td>数据二</td>
      <td>数据三</td>
    </tr>
    <tr class="even">
      <td>数据四</td>
      <td>数据五</td>
      <td>数据六</td>
    </tr>
    <tr>
      <td>数据七</td>
      <td>数据八</td>
      <td>数据九</td>
    </tr>
    <tr class="even">
      <td>数据十</td>
      <td>数据十一</td>
      <td>数据十二</td>
    </tr>
  </table>

  <script>
    let x = 10;
    function f(m) {
      return m * 2;
    }

    f(x + 5);
    //等同于
    var thunk = function (x) {
      return x + 5;
    }
    function f(thunk) {
      return thunk() * 2;
    }
  </script>
</body>

</html>